1 /*
   2  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @summary Test consistency of NMT by leaking a few select allocations of the Test type and then verify visibility with jcmd
  27  * @key nmt jcmd
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @build sun.hotspot.WhiteBox
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocTestType
  35  */
  36 
  37 import jdk.test.lib.process.ProcessTools;
  38 import jdk.test.lib.process.OutputAnalyzer;
  39 import jdk.test.lib.JDKToolFinder;
  40 import sun.hotspot.WhiteBox;
  41 
  42 public class MallocTestType {
  43 
  44   public static void main(String args[]) throws Exception {
  45     OutputAnalyzer output;
  46     WhiteBox wb = WhiteBox.getWhiteBox();
  47 
  48     // Grab my own PID
  49     String pid = Long.toString(ProcessTools.getProcessId());
  50     ProcessBuilder pb = new ProcessBuilder();
  51 
  52     // Use WB API to alloc and free with the mtTest type
  53     long memAlloc3 = wb.NMTMalloc(128 * 1024);
  54     long memAlloc2 = wb.NMTMalloc(256 * 1024);
  55     wb.NMTFree(memAlloc3);
  56     long memAlloc1 = wb.NMTMalloc(512 * 1024);
  57     wb.NMTFree(memAlloc2);
  58 
  59     // Run 'jcmd <pid> VM.native_memory summary'
  60     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
  61     output = new OutputAnalyzer(pb.start());
  62     output.shouldContain("Test (reserved=512KB, committed=512KB)");
  63 
  64     // Free the memory allocated by NMTAllocTest
  65     wb.NMTFree(memAlloc1);
  66 
  67     output = new OutputAnalyzer(pb.start());
  68     output.shouldNotContain("Test (reserved=");
  69   }
  70 }